Improvement in steam-engine governors



NITED STATES PATENT OFFICE.

T. s. LA FRANCE, oF ELMIRA, NEW YORK.

IM'P`ROVEMENT lN STEAM-ENGINE GOVERNORS.

Specification forming part of Letters Patent No. 56,956. dated August 7, 1866.

To all whom it may concert.:

Be it known that I, TRUOKSON S. LA FRANCE, of Elmira, in the county of Uhemun g and State of New York, have invented a new and useful Improvement in Governors for Steam Engines; and I do hereby declare that the following is a full, clear, and eXact description of the con struction and operation of the same, reference being had to the annexed drawings, made part of this specification, in whieh Figure 1 is a side elevation. Fig. 2 is an end elevation.

The same letters are used in referr'ing to different parts.

This invention relates to improvements on my improved governor asnheretofore patented, for the purpose of simplifying and cheapening Jthe construction of the same.

lA represents the governor-stand, in the circular part of which is arranged the bevelgearing' for driving the governor, which, being common, is not shown.. B is the spindle, which is made hollow so as topermit the valve-rod to pass through its center from the ball D to the arm of the val ve. This spindle reoeives its motion from suitable gearing, as mentioned.

- O O are arms attaehed to a collar bolted to and turning with the spindle, and so formed asto afford a suitable fulcrum for the levers EE, as shown. D is a ball through which the spindle passes, sliding freely vertically. This is represented as a sphere. lt may be of any form, as may also the balls G G. The fianges D' are attached to and form part of the ball D,

being cast separately and united, as represented, or cast in one piece. The arms of this fiange are slotted in their ends to receive the revolving collars F, which turn freely on the bolts by which they are suspended.

The bent levers E are slotted at the end and fitted on the collars F, so as to relieve the action of the governor from loss by'friction` as much as possible. The levers E are bent at right angles, or nearly so, and are pivoted at the angle to the arms O at E'. The perpendicular arms are fitted to receive the balls G G, which are fastened by a pin, H, passing through one of a series of holes, H', in the lever, or by any other equivalent mode. The position of the balls on the perpendicular portions of the levers E determines, by increasing or diminishing the amount of their leverage, the amount of their action on the valve.

The valve-rod is attached) t'o theflange D' 'by a bolt passing through both and through a slot in the hollow spindle B long enough to afford all necessary Vertical play to the valverod.

The spiral spring I inoreases the resistance of the weight D as lit rises, and the collar K should be made to screw down upon the spindle, compressing the spiral spring, so as to increase its tension, as may be desire'd.

The centrifugal action of the balls G is indcated by the red lines in Fig. 1.

What I claim as my invention, and desir their action by altering their distance from .the fulcrum, substantially as set forth.

4. In combination with the fl'ange D' and lever E, the friiction-roller F, the said parts being arranged substantially as and for the purpose set forth.

5. In combination with the ball D and balls G, the spiral spring I, substantially as and for the purpose set forth.

In testimony whereof I have signed my name to this speeification in the presence of two subscribing Witnesses.

T. S. LA FRANCE.

Witnesses: w

D. P. HoLLowAY, O. F. CLAUssEN. 

